/Engine/Plugins/Runtime/RigVM/Source/RigVM/Public/RigVMFunctions/RigVMDispatch_Select.h
Returns the name to use for the branch info / argument based on the operand index. operand index count may be different than the number of arguments, since fixed size array arguments get unrolled.
virtual [FName](API\Runtime\Core\UObject\FName) GetArgumentNameForOperandIndex ( int32 InOperandIndex, int32 InTotalOperands ) const